HP Prime Graphing NW280AAABA manual ColDim Returns the number of columns of a matrix

charpoly Returns the coefficients of the characteristic polynomial of a matrix. With only one argument, the variable used in the polynomial is x. With a variable as second argument, the polynomial returned is in terms of that variable.

charpoly(Mtrx,[Var])

Example:

charpoly	⎛	1 2	⎞	returns z2 – 5 ⋅ z – 2
	⎜		, z⎟
	⎝	3 4	⎠

chrem Returns a vector containing the Chinese remainders for two sets of integers, contained in either two vectors or two lists.

chrem(List1, List2) or chrem(Vector1, Vector2)

Example:

chrem([2,3],[7,5]) returns [-12,35]

col Given a matrix and integer n, returns the column of index n of the matrix.

col(Matrix, Integer)

Example:

⎛	1 2 3	⎞
⎜		⎟	returns [2,5,8]
col ⎜	4 5 6	, 2⎟
⎜	7 8 9	⎟
⎝		⎠

colDim Returns the number of columns of a matrix.

colDim(Mtrx)

Example:

colDim ⎛ 1 2 3 ⎞ returns 3 ⎜⎝ 4 5 6 ⎟⎠

comDenom Rewrites a sum of rational fractions as a one rational fraction. The denominator of the one rational fraction is the common denominator of the rational fractions in the original expression. With a variable as second argument, the numerator and denominator are developed according to it.

comDenom(Expr,[Var])

Example:

comDenom(1/x+1/y^2+1) gives (x*y^2+x+y^2)/ (x*y^2)

384 Functions and commands